Chihuahua Puppy: Development, Care & Adoption Tips
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The chihuahua puppy goes through a critical period from birth to 8 weeks, growing from a blind newborn weighing 80-150 grams (2.8-5.3 oz) into an alert little dog ready for adoption. This remarkable phase includes the eyes opening around 10-14 days, gradual weaning from 3 weeks, and primary socialization with the mother and littermates, which shapes the balance of the future adult dog. Understanding the growth stages, the life-threatening risks (low blood sugar, hypothermia), the specific nutritional needs and socialization helps breeders ensure an optimal start and helps adopters prepare for a smooth arrival. This guide details the puppy's development week by week, the essential care protocols, suitable feeding and all the practical advice to support these first decisive days that shape your future companion's character and health.
The essentials: The chihuahua puppy is born blind, deaf and unable to regulate its body temperature, weighing 80-150 g (2.8-5.3 oz). Development: Eyes open at 10-14 days, hearing at week 3, first teeth at 3-4 weeks, steady walking at 4 weeks. Growth: Doubles its weight in about 10 days, reaches 6-10 times its birth weight by 6 weeks, and weighs 400-900 g (14 oz-2 lb) at 8 weeks. Risks: Hypoglycemia (life-threatening emergency), hypothermia (needs 82-86°F / 28-30°C in week 1), dehydration. Weaning: Starts at 3-4 weeks (softened kibble), complete at 7-8 weeks. Socialization: Critical period at 3-8 weeks with mother and littermates = fundamental learning. Adoption age: NEVER before 8 weeks. Ideal 10-12 weeks (full emotional weaning). Budget: in France, €800-1,500 for a pedigreed puppy + €300-500 vet costs + €400 starter supplies.
Birth of the chihuahua puppy
The whelping is a delicate moment that requires close monitoring because of the breed's small size.
Pregnancy and delivery
| Item | Details |
|---|---|
| Duration | 63 days on average (59-65 days possible) |
| Litter size | 1 to 4 puppies (average 2-3 puppies) |
| C-section | Frequent (30-40% of cases) if the dam weighs under 4 lb (1.8 kg) or the puppies are large |
| Signs labor is near | Temperature drops to 99°F (37°C) about 24 hours before, restlessness, scratching at the nest, loss of appetite |
| Whelping duration | 2 to 12 hours depending on the number of puppies. 15 minutes to 2 hours between puppies |
The newborn: condition at birth
Puppy characteristics on day 0
Weight: 80-150 g (2.8-5.3 oz) (mini 70-90 g / 2.5-3.2 oz, standard 120-180 g / 4.2-6.3 oz). Appearance: Eyes sealed shut, ears flat against the head, pink/grayish skin, very fine short hair, open fontanelle (normal). Abilities: BLIND and DEAF. Rudimentary sense of smell. Uncoordinated crawling. Cannot regulate body temperature (it matches the environment). Cannot eliminate on its own (the mother licks to stimulate). Behavior: Sleeps 90% of the time, nurses every 2-3 hours, cries when cold or hungry, stays huddled with littermates (shared warmth).
Week-by-week development
The puppy's development follows precise stages that shape its future balance.
Week 1 (D0-D7): Neonatal period
The critical first week
Development: Eyes and ears closed. Umbilical cord falls off D3-D5. Weight doubles in 7-10 days. Body temperature 95-97°F (35-36°C), gradually reaching 99-100°F (37-38°C). Abilities: Crawls toward the teat. Warmth-seeking rooting reflex. No independent temperature regulation. Feeding: Nurses on mother's milk every 2-3 hours, day and night. Colostrum is crucial for the first 24-48 hours (antibodies). Needs: Nest at 82-86°F (28-30°C) MANDATORY. Daily weighing (should gain 5-10% of body weight per day).
Week 2 (D8-D15): Sensory awakening
Opening up to the world
Eyes open: D10-D14 (gradually over 2-3 days). Blurry vision at first. Blue-gray color (changes at 6-8 weeks). Hearing: Starts at the end of the week (D13-D15). Reacts to loud noises. Motor skills: Coordinated movements. Lifts head and front end. Unsteady attempts at walking. Weight: Doubled/tripled (160-450 g / 5.6 oz-1 lb). Nest temperature: 79-82°F (26-28°C).
Week 3 (D16-D21): Transition
First steps and teeth
Senses: Vision and hearing are functional. Curious about the environment. Motor skills: First wobbly steps! Stands on all four legs. Coordination improves quickly. Teeth: Incisors come in. Start of weaning: Interest in the mother's food. Introducing softened kibble is possible. Elimination: Spontaneous, away from the nest (cleanliness reflex). Weight: 250-550 g (8.8-19.4 oz). Social: Interactions with littermates (play, little nips = learning).
Weeks 4-8: Primary socialization
Week 4 (D22-D28)
Independence: Steady walking. Runs clumsily. Active exploration. Temperature regulation almost functional. Teeth: Incisors, canines, premolars (full set of 28 puppy teeth around 6-8 weeks). Active weaning: Softened kibble 3-4 times a day + nursing from the mother. Social: Active play with littermates. Learning dog language. The mother starts to teach manners. Weight: 300-700 g (10.6 oz-1.5 lb).
Weeks 5-7 (D29-D49)
Peak curiosity: Intense exploration. Chews everything. Plays with objects. Human socialization: Getting used to the presence of many different people. Daily handling is essential. Feeding: Advanced weaning. 4 kibble meals a day. Occasional nursing. Personality: Individual temperament emerges. Deworming: 2nd dose at D35. Vaccines: Initial vaccination series D42-D49. Weight: 400-900 g (14 oz-2 lb) (6-10x birth weight).
Week 8 (D50-D56): Adoption possible
MINIMUM AGE: 8 weeks is the absolute minimum. NEVER earlier. Independence: 100% weaned. Eats dry kibble 3 times a day. Housetraining has begun. Socialization: Basic dog manners acquired (bite inhibition, body postures). Health: Microchip placed, initial vaccinations and deworming up to date, vet health certificate less than 7 days old. Weight: 400-950 g (14 oz-2.1 lb). Documents: Pedigree/registration papers, health record, attestation, contract.
Chihuahua puppy growth curves
Growth is fast and lets you anticipate adult weight.
Weight progression, 0-8 weeks
| Age | Mini (2.2-3.3 lb adult / 1-1.5 kg) | Standard (4.4-5.5 lb / 2-2.5 kg) | Large (5.5-6.6 lb / 2.5-3 kg) |
|---|---|---|---|
| Birth | 2.5-3.5 oz (70-100 g) | 3.7-5.3 oz (105-150 g) | 4.9-6.3 oz (140-180 g) |
| 1 week | 4.2-5.8 oz (120-165 g) | 5.8-8.8 oz (165-250 g) | 7.8-10.6 oz (220-300 g) |
| 2 weeks | 5.6-7.4 oz (160-210 g) | 7.4-14.1 oz (210-400 g) | 10.6-15.9 oz (300-450 g) |
| 4 weeks | 8.8-11.6 oz (250-330 g) | 11.6-22.2 oz (330-630 g) | 15.9-24 oz (450-680 g) |
| 6 weeks | 11.6-15.9 oz (330-450 g) | 15.9-28.6 oz (450-810 g) | 21.2-31.7 oz (600-900 g) |
| 8 weeks | 14.1-19.4 oz (400-550 g) | 19.4-33.5 oz (550-950 g) | 26.5-38.8 oz (750-1,100 g) |
📏 Estimation formula: Adult weight ≈ 8-week weight × 2.5-3. Example: 600 g (21 oz) at 8 weeks = 1.5-1.8 kg (3.3-4 lb) as an adult.
Feeding the chihuahua puppy
Feeding directly determines growth, immunity and future health.
Mother's milk: the ideal food
Why mother's milk matters
Colostrum (0-48h): The first milk = LIQUID GOLD. Maternal antibodies = immunity for the first 6-8 weeks. The puppy MUST nurse within 12-24 hours of birth. Mature milk: Protein 30%+, fat 40%+, perfect composition. Frequency: Every 2-3 hours, day and night. Spaces out to every 3-4 hours at 3 weeks. Duration: 6-8 weeks ideal. Production naturally decreases in weeks 4-6.
Weaning
-
Week 3-4: Gradual introduction
Small-breed puppy kibble SOFTENED with warm water (mush). 1-2 meals a day. Puppies taste and learn to eat. Nursing continues (still the main source). -
Week 4-5: More solid food
3-4 softened kibble meals a day. Portions increase. Nursing decreases. Fresh water in a separate bowl. -
Week 6-7: Advanced weaning
4 meals a day, progressively less softened. Occasional nursing (comfort). Solid food is the main source. -
Week 8+: Full weaning
100% dry kibble. 3-4 meals a day. Amount 50-80 g/day (1.8-2.8 oz) depending on weight. Water always available.
Criteria: "Small/extra-small breed puppy" formula. Protein 28-32%+. Fat 18-22%. Meat as ingredient #1. Miniature kibble size. DHA for brain development. Brands: Royal Canin Chihuahua Puppy, Pro Plan Puppy Small Breed, Hill's Puppy Small, Eukanuba Puppy Small. Transition: Switch gradually over 7-10 days if changing brands.
Life-threatening risks and prevention
Chihuahua puppies are vulnerable to certain life-threatening emergencies.
Hypoglycemia: danger #1
Other major risks
- Hypothermia: Under 3 weeks, puppies cannot regulate their temperature. Nest at 82-86°F (28-30°C) in week 1. Warm up gradually if chilled
- Dehydration: Diarrhea, excessive heat. Signs: skin loses elasticity, dry gums. Oral or injectable rehydration
- Being crushed by the mother: Whelping box with anti-crush rails is essential D0-D7
- Neonatal infections: Immature immune system. Strict nest hygiene is mandatory
Early socialization
Socialization starts in the nest and shapes future balance.
Role of the mother and littermates
Fundamental learning
Mother: Teaches dog language, bite inhibition, cleanliness, behavioral limits, emotional weaning. Littermates: Play-fighting = control of bite force, dog communication, hierarchy, sharing resources. Critical period: 3-8 weeks = irreplaceable social learning. Separation too early = deficits (uninhibited biting, misreading signals, fears, aggression).
Human socialization by the breeder
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Weeks 2-3: First handling
Pick up the puppies daily. Gentle petting. Calm voice. Getting used to human contact = trust. -
Weeks 4-5: Varied handling
Examine ears/teeth/paws. Carry in different positions. Meet different people. Supervised children. -
Weeks 6-8: Enrichment
Everyday noises (vacuum cleaner, TV). Different surfaces (tile, grass). New objects. Desensitization = confident adult.
Getting ready for your puppy's arrival
Adoption requires practical and mental preparation for a smooth transition.
Essential supplies
- Bed: Right-sized bed in a quiet area. Blanket with the breeder's scent (reassuring transition)
- Food: Same kibble as the breeder (1 month minimum). Stable stainless steel/ceramic bowls. Water always available
- Safety: Puppy playpen or a secured room. Remove dangerous items (cables, toxic plants, small objects). Stair gates
- Transport: Approved, ventilated carrier/bag. Comfortable blanket. Mandatory in the car
- Toys: Right-sized toys (plush, ropes, soft balls). Avoid ones that are too small (choking) or too hard
- Hygiene: Training pads. Soft brush. Puppy shampoo. Miniature nail clippers
First days at home
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A calm arrival
Calm trip. On arrival, offer an immediate potty break. Reward if it goes. Let it explore a secured area at its own pace. -
Immediate routine
Set fixed times for meals/outings/naps from day 1. Puppies love consistency. Keep up the breeder's habits if possible. -
Nights in the first weeks
It's normal for it to cry (separation from mother and littermates). A bed near you is reassuring. Don't give in every time (learning to be alone). A plush toy or a lukewarm hot water bottle comforts. -
Gradual housetraining
Go out every 2 hours at first. After meals, waking up and play. Reward outdoor elimination. NEVER punish accidents (counterproductive). Be patient: full housetraining takes 4-6 months. -
Ongoing socialization
Once vaccines are complete (booster at D70), gradually expose it to other vaccinated dogs, different people and varied environments. Puppy classes recommended. -
Vet follow-up
Check-up visit 48-72 hours after adoption. Booster vaccine at 10-12 weeks. Monthly deworming until 6 months. Verify identification.
Don't overprotect: Let it walk (don't carry it all the time). Expose it to the world (don't isolate it). Treat it like a dog (not a human baby). Don't overfeed: Stick to the portions. Obesity is dramatic in small breeds. Don't skip socialization: The 8-16 week window is crucial. Positive exposure = balanced adult. Don't neglect training: Start training on arrival (sit, come, stay). Small size ≠ exemption from training.
FAQ – Chihuahua puppy
During its first 8 weeks, the chihuahua puppy goes through an extraordinary period of development that shapes its whole future life. From a blind, totally dependent newborn to an alert, sociable little dog, this transformation requires careful monitoring, appropriate care and absolute respect for the growth stages.
The life-threatening risks (hypoglycemia, hypothermia), gradual weaning and above all primary socialization with the mother and littermates are irreplaceable phases that only a skilled breeder can guarantee. Adopting before 8 weeks, beyond often being illegal, seriously compromises the puppy's behavioral balance and health.
By understanding these crucial stages and carefully preparing for your puppy's arrival (supplies, routine, long-term commitment), you give yourself every chance of welcoming a balanced, sociable and healthy companion who will share your life for 14 to 18 years. Respecting these decisive first days is the best gift you can give your future chihuahua.